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Chain guide for the front derailleur of a bicycle

A chain guide and front derailleur technology, which is applied in the field of gear shifting devices, can solve the problems of increasing the total weight of the chain guide, and achieve the effect of reducing weight

Inactive Publication Date: 2009-02-11
CAMPAGNOLO SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In these known chain guides, it is necessary to make the inner plate have a larger extension than the outer plate, which inevitably increases the overall weight of the chain guide

Method used

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  • Chain guide for the front derailleur of a bicycle
  • Chain guide for the front derailleur of a bicycle
  • Chain guide for the front derailleur of a bicycle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] In these figures, a bicycle front derailleur (not shown in the figure) with a chain guide 3 according to the present invention is denoted by reference numeral 1 as a whole. The front derailleur 1 mainly includes a hinged quadrilateral positioning mechanism 2, and the chain guide plate 3 constitutes a side of the mechanism. Such as figure 1 As shown, the front derailleur 1 is mounted to the bicycle underframe in a conventional manner, usually a seat tube T( figure 1 Only a part of it is shown in), so that the chain guide in the operating state is located on the bottom bracket and close to the bottom bracket. The bottom bracket includes a set of sprockets (for example, a pair of sprockets TW1, TW2), and the chain guide can Maneuver the chain C wound on one of the set of sprockets.

[0049] The chain guide plate 3 (see Figures 2-4) includes a first plate or inner plate 4 and a second plate or outer plate 5, the two plates are arranged oppositely and substantially parallel, a...

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PUM

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Abstract

A chain guide (3) for a bicycle front derailleur (1), comprising: a first plate (4) for switching the chain from a first sprocket to a second sprocket with a larger diameter; a second plate (5) opposite the first plate (4) for switching the chain from the second sprocket to the first sprocket; and between the first plate (4) and Connection means (7) between said second plates (5). The first plate (4) comprises a first push portion (41) for switching the chain from the first sprocket to the second sprocket. The first push portion is located on a protrusion (46) on the first plate portion (410), the protrusion having a lower profile (450) protruding relative to the lower profiles (451, 452) of the remaining plate portions. It is thus possible to minimize the dimensions of the rest of the first plate, thereby reducing the weight of the chain guide without changing its characteristics or reducing its structural strength.

Description

Technical field [0001] The invention relates to a chain guide plate for a bicycle front derailleur, that is, a chain that can determine and guide the chain to switch from one sprocket in a set of sprocket wheels on a bicycle bottom bracket to another with a different diameter during driving. A device for shifting gears on the sprocket. [0002] The present invention also relates to a front derailleur including such a chain guide and a plate for the chain guide. Background technique [0003] As we all know, the front derailleur of a bicycle includes a chain guide plate (or cage) and a chain guide plate positioning mechanism above the chain. Typically, the chain guide positioning mechanism is a hinged parallelogram mechanism, which is fixed on the frame seat tube. The chain guide plate can be connected with the positioning mechanism, or can directly constitute an integral part of the mechanism. The movement of the positioning mechanism is usually carried out by mechanical actuators...

Claims

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Application Information

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IPC IPC(8): B62M9/12B62M9/136F16H9/00F16H9/06
CPCB62M9/136
Inventor 毛里齐奥·瓦莱保罗·帕斯夸
Owner CAMPAGNOLO SRL